LTC3427

PRODUCTION

500mA, 1.25MHz Synchronous Step-Up DC/DC Converter in 2mm × 2mm DFN Package

Data Sheet (Rev. B) Product Selection Table
Viewing:

Overview

  • High Efficiency: Up to 94%
  • 3.3V at 200mA from Two Alkaline Cells
  • 5V at 200mA from a Single Li-Ion Cell
  • Inrush Current Limiting and Soft-Start
  • Output Disconnect in Shutdown
  • 1.8V to 5V VIN Range
  • 1.8V to 5.25V VOUTRange
  • 1.25MHz Fixed Frequency, Low Noise PWM
  • Internal Synchronous Rectifier
  • Logic Controlled Shutdown (<1μA)
  • Anti-Ringing Control Minimizes EMI
  • Tiny External Components
  • Short-Circuit Protection
  • Low Profile (0.75mm × 2mm × 2mm) DFN Package

The LTC3427 is the industry’s first high efficiency, fixed frequency, step-up DC/DC converter with true output disconnect in a 6-lead 2mm × 2mm DFN package. Requiring minimal external components, the LTC3427 operates from an input voltage as low as 1.8V. The LTC3427 contains an internal 0.525Ω N-channel MOSFET switch and a 0.575Ω P-channel MOSFET synchronous rectifier, which enables it to supply 200mA at 3.3V from a 2-cell alkaline battery input.

The LTC3427 limits inrush current during start-up and provides a soft-start of VOUT. A switching frequency of 1.25MHz minimizes solution footprint by allowing the use of tiny, low profile inductors and ceramic capacitors and produces very low VOUT ripple. The current mode PWM design is internally compensated, reducing external parts count. Anti-ringing control reduces EMI in discontinuous mode operation. The LTC3427 also features low shutdown current of under 1μA and thermal shutdown.

APPLICATIONS

  • Handheld Instruments
  • Digital Cameras
  • Wireless Handsets
  • GPS Receivers
  • Portable Medical Devices
  • MP3 Players
LTC3427
500mA, 1.25MHz Synchronous Step-Up DC/DC Converter in 2mm × 2mm DFN Package
LTC3427 Application Circuit LTC3427 Pin Configuration LTC3427 Performance Graph
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Technical Articles 1

Learn More
Add to myAnalog

Add media to the Resources section of myAnalog, to an existing project or to a new project.

Create New Project

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Hardware Ecosystem

Parts Product Life Cycle Description
Switching Regulators & Controllers 1
LTC3526L-2
RECOMMENDED FOR NEW DESIGNS 550mA 2MHz Synchronous Step-Up DC/DC Converters in 2mm × 2mm DFN
Modal heading
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project

Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTC3427
  • LTC3427-2
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
DC856A

LTC3427EDC Demo Board | 1.8V ≤ VIN ≤ 3.6V, VOUT = 3.3V @ 180mA

Buy Now View Details

Product Details

Demonstration circuit 856A is a 500mA, 1.25MHz Synchronous Boost Converter featuring the LTC3427EDC. The demo circuit demonstrates a DC/DC boost converter, with a 500mA switch current limit, providing 3.3V at 180mA from a 1.8V to 3.6V input voltage.
DC856A
LTC3427EDC Demo Board | 1.8V ≤ VIN ≤ 3.6V, VOUT = 3.3V @ 180mA
DC856A - Schematic

Latest Discussions

No discussions on LTC3427 yet. Have something to say?

Start a Discussion on EngineerZone®

Recently Viewed